PUADEFDV014B - Perform concreting in an underwater environment

PUADEFDV014B
Perform concreting in an underwater environment

This unit covers the competency required to concrete simple forms and excavations in an underwater environment.The unit also includes preparing the underwater site for concreting including any necessary excavation and levelling, constructing simple formwork and positioning reinforcement rods and fixed anchorages.The diver will need to prepare the concrete with consideration given to strength and setting periods. The concrete will need to be poured and screeded to the required finish.The diver will be responsible for the recovery of formwork and waste arising from the work task to ensure the preservation of the environment. Finally, the concreting tools must be de serviced and stored appropriately for ongoing use.Note: This Unit of Competency relates, in part, to the existing standards of the Australian Diver Accreditation Scheme (ADAS). All information was correct at the time of development of this Unit of Competency; however, any diver seeking ADAS accreditation should consult ADAS and not rely on the information contained in this unit.

Application

The application of this unit in the workplace - the environments, complexities and situations involved - will be written during Phase II of the Review of the PUA00 Public Safety Training Package.

This text will be useful for the purposes of job descriptions, recruitment advice or job analysis; where possible, it will not be too job specific to allow other industries to import it into other Training Packages, where feasible.

Prerequisites

Prerequisite Unit/s

PUADEFDV001B Dive using self contained underwater breathing apparatus in open water to 30 metres

Elements and Performance Criteria

ELEMENT	PERFORMANCE CRITERIA
1. Prepare for underwater concreting	1.1 Work task and worksite data are determined and analysed to determine the specific requirements for the concrete 1.2 Work plan is developed consistent with the dive plan 1.3 Concretingequipment is selected, inspected and prepared including protective equipment 1.4 Concreting equipment is secured safely to/from the dive site 1.5 Access obstructions and other hazards are assessed and action is taken to remove/reduce the risk
2. Concrete underwater site	2.1 Work-safe area is established at the worksite 2.2 Site is cleared and levelled in preparation for the pour 2.3 Formwork is assembled including stripping agents 2.4 Reinforcing bars, rods, stirrups and mesh, bar chairs and spacers are positioned 2.5 Cement is mixed in accordance with the setting and strength specifications 2.6 Location and safety of divers is confirmed prior to commencing the pour 2.7 Cement is delivered to the site with a consistent flow 2.8 Concrete is spread to the required levels incorporating expansion joints 2.9 Concrete is screeded to a level and the surface is finished using floats or brooms 2.10 Concrete is protected during curing
3. Conclude underwater concreting	3.1 Environmental impact arising from the concreting is minimised and waste products and formwork are recovered 3.2 Concreting and protective equipment are de-serviced and stored after use

Required Skills

This describes the essential skills and knowledge and their level, required for this unit.

Required Skills

establish formwork

mix and pour cement

operate cement tools and equipment

screed concrete

Required Knowledge

concreting on land

dive equipment

dive physics

general occupational/diving safety awareness

oceanography

relevant references and Australian Standards

work hazards

Evidence Required

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessment must confirm the ability to attend to personal and collective safety; and to consider the environmental impact as part of the dive plan.

Consistency in performance

Competency should be demonstrated during a work task where the diver conducts an underwater concreting task such as the reinforcement of pier legs, the placement of footings or laying of a slab or ramp.

Context of and specific resources for assessment

Context of assessment

Competency should be assessed in the ocean.

When practicable, assessment should relate to the diver’s vocational focus.

Specific resources for assessment

Access to a dive location, a complete range of concrete ingredients and concreting equipment.

Guidance information for assessment

Information that will assist or guide assessment will be written during Phase II of the Review of the PUA00 Public Safety Training Package.

Range Statement


The Range Statement relates to the Unit of Competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording in the Performance Criteria is detailed below.
Work task may include	Pad foundation Post holes Slabs Trench foundations
Worksite data may include	Current Depth Gradient Hazards Obstacles Temperature
Concrete may vary by	Composition/strength Setting time
Concreting equipment may include	Manual, fuel and electrically operated mixers Shovel Vibrator
Selecting, inspecting and preparing concreting equipment may include	Pre-construction of formwork Pre-mixing
Protective equipment may include	Boots Gloves
Action to remove/reduce the risk may include	Erecting signage Using patrol/sentry craft
Formwork may include	Bracing Edge boards Pegs Struts
Delivery of cement may be via	Manual Pump-line Shute
Protection of concrete may include	Use of plastic sheeting
Environmental impact may include	Contamination of surrounding water (e.g. leaking oil) Physical damage to reef and associated floor eco-systems (e.g. coral) Visual pollution of waste material (e.g. concrete and metal parts)

Sectors

Not applicable.

Employability Skills

This unit contains employability skills.

Licensing Information

Not applicable.